People who play Tetris for a prolonged amount of time may then find themselves thinking about ways different shapes in the real world can fit together, such as the boxes on a supermarket shelf or the buildings on a street.Earling, A. (1996, March 21-28). Philadelphia City Paper In this sense, the Tetris effect is a form of habit. They might also dream about falling Tetris shapes when drifting off to sleep or see images of falling Tetris shapes at the edges of their visual fields or when they close their eyes. In this sense, the Tetris effect is a form of hallucination or hypnagogic imagery.

Other examples

The Tetris effect can occur with other video games,Terdiman, D. (January 11, 2005). Wired with any prolonged visual task (such as classifying cells on microscope slides, weeding, picking or sorting fruit, flipping burgers, driving long distances, or playing board games such as chess or go), and in other sensory modalities. For example, there is the tendency for a catchy tune to play out unbidden in one's mind (an earworm). In kinesthesis, a person newly on land after spending long periods at sea may move with an unbidden rocking motion,...Read More